Lock.



J. B. CALVERT.

LOCK.

APPLICATION FILED JULY 31, 1913.

Patented Jan. 20, 1914.

- companying UNITE STT TATENT QFFIC JOHN B. CALVERT, F COALGATE,OKLAHOMA.

LOCK.

To all whom it may concern:

Be it known that I, J OHN B. CALVERT, a citizen of the United States,residing at Coalgate, in the county of Coal and State of Oklahoma, haveinvented certain new and useful Improvements in Locks, of which thefollowing is a specification.

This invention relates to locks.

One object is to provide a simple, inexpensive, durable and efiicientrim or mortise lock.

Another object resides in the provision of a lock of the nature statedembodying a comparatively few number of parts which may be readilyassembled without danger of derangement and which may be readilymanipulated to effect opening, closing and looking of doors to which thelock may be applied.

A still further object resides in the provision of a lock embodyingamong other characteristics a bolt, a spindle bushing, a locking devicemovable into and out of the path of the bolt, with yieldable meansadapted to exert pressure both upon the spindle bushing and the lockingdevice, both the spindle bushing and the locking device being relievedof pressure thereagainst by saidpressure exerting means under theinfluence of the key which manipulates the lock.

With the above and other objects in view, the present invention consistsin the combination and arrangement of parts hereinafter more fullydescribed, illustrated in the acdrawings and particularly pointed out inthe appended claims, it being understood that changes may be made in theform, proportion, size and minor details without departing from thespirit or sacrificing any of the advantages of the invention.

In the drawings :Figure 1 is a face view of the lock with the front ofthe casing removed showing the locking device engaging the bolt toprevent operation of the bolt without the use of the key of the lock.Fig. 2 is a similar view illustrating the position of the parts when thelocking device is out of the path of movement of the bolt so that thebolt may be manipulated through operation of the knob spindle bushingwithout the use of the key. Fig. 3 is a transverse sectional view on theline m-w of Fig. 1. Fig. at is a detail perspective view of the lockingdevice.

Referring now more particularly to the accompanying drawings, thereference char- Specification of Letters Patent.

Application filed July 31, 1913.

Patented Jan. 20, 1914:-

Serial No. 782,331.

acter indicates a suitable casing provided with oppositely disposed keyslots 11 and with a bolt slot 12 through which latter is adapted toreciprocate the bolt 13. The bolt is provided with a slot 14 adapted toembrace the pin 15 whereby the bolt is guided through the slot 12 and atits inner end supported in true alinement with the slot 12. The ends ofthe slot 14 limit the inward and outward movement of the bolt if it benecessary to limit its movement.

The bolt 13 is reduced at its inner end forming a tail piece 16 and ashoulder 16. The tail piece 16 is provided with a recess 17 in whichrecess 17 engages the arm 18 carried by the spindle bushing 19 journaledin the casing. The spindle bushing is oscillated through theinstrumentality of the common knob spindle 20 and incident to0scillation of the spindle bushing the arm 18 is rocked, consequentlycausing reciprocation of the bolt 13. The spindle bushing 19 is providedwith another arm 21 which is engaged by a helical or other spring 22.This spring exerts an upward pressure on the arm 21 so as to throw thearm 18 forwardly and consequently maintain the bolt 13 normally inoutward position so that provision is made for normally fastening thedoor.

The spring 22 may be secured within the lock casing in any suitablemanner, but as shown, it is supported at its lower end by a lateralprojection 23 extending from a trigger 24 pivotally mounted within thecasing by means of a suitable pivot 25. The spring 22 thus exertspressure on the bushing spindle 19, by virtue of its connection with thearm 21 thereof, and it also exerts pressure on the trigger 24:.

To look the bolt 13 in its outer position and thereby prevent inwardmovement of the bolt except through the instrumentality of the key ofthe look, I provide a locking device consisting of a body portion 26 andarms 27 and 28. These arms 27, 28 are disposed upon opposite sides ofthe key slots 11. As shown in Fig. 1 the arm 28 is adapted to engage theshoulder 16 of the bolt 13 and thereby hold the bolt against inwardmovement. To maintain this locking position of the locking device thelip 32 of the trigger 34 is adapted to engage in the notch of thelocking device. The spring tension of the spring 22 is sufficient tohold the locking device against downward gravitat ing movement on itspivot 29. The arm 28 is larger and heavier than the arm 27 to causenormal downward gravitation of the arm 28 away from the shoulder 16 ofthe bolt 13, and by virtue of the spring 22 being connected with thetrigger 24: the lip 32 of the trigger prevents this normal tendency ofthe locking device to gravitate downwardly. The trigger 24 has a wing 33which overlaps the arm 27 of the locking device to guide the latter inits swinging movement. The arm 28 of the locking device is provided witha groove 34.

The key of the lock is indicated at 35. Its shank has a lug 36 fromwhich projects a finger 37.

Assuming the bolt to be locked in its outward position and it is desiredto unfasten the door the key 35 is inserted in the key slots 11. Bythrowing the lug 36 of the key to the right in Fig. 1 the finger 37projecting from the lug rides through the groove 34 of the arm 28 and bycontinued rotation of the key, the finger 37 engages the inner face ofthe arm 27 while the lug 36 engages the wing 33. The engagement of thelug 36 with the wing 33 moves the trigger 24 backwardly to release thelip 32 of the trigger from the notch 30 of the locking device, whereuponthe locking device gravitates downwardly to move the arm 28 out of thepath of the shoulder 16 ofthe bolt 13. Just as soon as the lug 36 andthe finger 37 leave the wing 33 and the arm 27, respectively, the lip 32engages the notch 31 of the locking device, whereupon the locking deviceis held in the position illustrated in Fig. 2 and when the lockingdevice is in this position, it is clear that by manipulation of the knobspindle 19 the bolt 13 may be reciprocated backwardly and forwardlyaccording to the direction of oscillation of the spindle bushing.

By virtue of my particular construction I am enabled to eliminatenumerous springs and to simplify the look as compared with many of thecomplicated locks now in use. It is apparent, also, that the lock is noteasily picked and that it is operable through the instrumentality' of aparticularly designed key.

The numeral 38 indicates a latch which may be used, if desired. Ifemployed, the bolt 13 may be provided with notches 39 and 40 and thelatch 38 provided with a dog 41 adapted to engage interchangeably in thenotches 39 and 40 according to whether the lock be used on a right orleft hand door. The latch may be provided with a handle 12 to facilitateits manipulation.

What is claimed is 1. In a lock of the character described, a casingprovided with key slots and a bolt slot, a bolt slidably mounted in thecasing through the bolt slot and provided with a recess, a spindlebushing provided with an arm lying in the recess of the bolt, meansexerting pressure on the spindle bushing to rock the arm and therebyforce the boltnormally outwardly, a trigger to which said pressureexerting means is connected, a looking device pivotally mounted in thecasing and engaged by said trigger and operable for movement into andout of the path of movement of the bolt through the instrumentality ofthe key of the lock against the action of said pressure exerting meansand the trigger.

2. In a lock of the character described, a casing, a bolt slidablymounted in the casing and provided with a recess, a spindle bushingjournaled in the casing and provided with an arm lying in the recess ofthe bolt, a locking device pivotally mounted in the casing and includinga body and spaced arms, a spring having connection with the spindlebushing, a trigger having connection with the spring and with saidlocking device whereby the locking device may be held in the path ofmovement of the bolt, and means engageable with the locking device andthe trigger to effect movement of the lockin device out of the path ofmovement of theiiolt.

3. In a lock of the character described, a casing provided with keyslots and a bolt slot, a bolt slidably mounted in the casing through thebolt slot and provided with a recess, a spindle bushing provided with anarm lying in the recess of the bolt, means exerting pressure on thespindle bushing to rock the arm and thereby force the bolt normallyoutwardly, a trigger to which said pressure exerting means is connected,a look ing device pivotally mounted in the casing and engaged by saidtrigger and operable for movement into and out of the path of movementof the bolt through the instrumentality of the key of the lock againstthe action of said pressure exerting means and the trigger, and a latchengageable with the bolt to lock the bolt in its outward positionindependently of the aforesaid locking de Vice.

4. In a lock of the character described, a casing provided with keyslots and a bolt slot, a bolt slidably mounted in the casing through thebolt slot and provided with a recess, a spindle bushing provided with anarm lying in the recess of the bolt, means exerting pressure on thespindle bushing to rock the arm and thereby force the bolt nor mallyoutwardly, a trigger to which said pressure exerting means is connected,a locking device pivotally mounted in the casing and engaged by saidtrigger and operable for movement into and out of the path of movementof the bolt through the instrumentality of the key of the lock againstthe action of said pressure exerting means and the trigger, and a latchengageable with the bolt to lock the bolt in its outward positionindependently of the aforesaid locking device, and to cooperate withsaid locking device to reinforce the latter in holding the bolt inoutward position.

5. In a lock of the character described, a casing, a bolt slidablymounted in the casing and provided with a recess, a spindle bushingjournaled in the casing and provided with an arm lying in the recess ofthe bolt, a locking device pivotally mounted in the casing and includinga body and spaced arms, a spring having connection with the spindlebushing, a trigger having connection with the spring and with saidlocking device whereby the locking device may be held in the path ofmovement of the bolt, and means engageable with the locking device andthe trigger to effect movement of the locking device out of the path ofmovement of the bolt, and a latch engageable with the bolt.

6. In a lock of the character described, a casing, a bolt slidablymounted in the casing and provided with a recess, a spindle bushingjournaled in the casing and provided with an arm lying in the recess ofthe bolt, a gravitating locking device movable into and out of the pathof movement of the bolt, aspring having connection with the spindlebushing to exert pressure on the latter and thereby hold the bolt inoutward position, said locking device having spaced notches, a triggerin the casing and having connection with the aforesaid spring andprovided with a lip adapted to engage in one of the notches of thelocking device to hold the latter against gravitating movement out ofthe path of movement of the bolt, and means engageable with the lockingdevice and the trigger to release the lip of the latter from said notchand permit the locking device to gravitate out of the path of movementof the bolt, the lip of the trigger engaging the other of said notchesto limit the downward gravitating movement of the locking device.

7. In a. lock of the character described, a casing, a bolt slidablymounted in the casing and provided with a recess, a spindle bushingjournaled in the casing and provided with an arm lying in the recess ofthe bolt. a locking device pivotally mounted in the easing and includinga body and spaced arms, a spring having connection with the spindlebushing. a trigger having connection with the spring and with saidlocking device whereby the locking device may be held in the path ofmovement of the bolt, means engageable with the locking device and thetrigger to effect movement of the locking device out of the path ofmovement of the bolt, the bolt having notches, and a latch movable intothe notches interchangeably to hold the bolt in position.

8. In a lock of the character described, a casing provided with a boltslot, a bolt slidably mounted in the casing through the bolt slot, aspindle bushing having operative connection with the bolt to reciprocatethe lat ter upon oscillation of the spindle bushing, a locking devicemounted in the casing for movement into and out of the path of movementof the bolt, a trigger engageable with the locking device, a springconnection between the trigger and the spindle bushing, and a keyengageable with the locking device and the trigger to operate them toefi'ect movement of the locking device into and out of the path ofmovement of the bolt.

9. In a lock of the character described, a casing provided with a boltslot, a bolt slidably mounted in the casing through the bolt slot, aspindle bushing having operative connection with the bolt to reciprocatethe latter upon oscillation of the spindle bushing, a spring havingconnection with the spindle bushing to oscillate the same in onedirection to retain the bolt normally in outward position, a gravitatinglocking; device movable into and out of the path of movement of thebolt, a trigger to hold the locking device against gravitating movementout of the path of movement of the bolt, and means en gagealole with thelocking device and the trigger to release the latter and permit it togravitate out of the path of movement of the bolt.

10. In a lock of the character described, a casing provided with a boltslot, a bolt slidably mounted in the casing through the bolt slot, aspindle bushing having operative con nection with the bolt toreciprocate the latter upon oscillation of the spindle bushing, a springhaving connection with the spindle bushing to oscillate the same in onedirec tion to retain the bolt normally in outward position, agravitating locking device movable into and out of the path of movementof the bolt, a trigger to hold the locking device against gravitatingmovement out of the path of movement of the bolt, and means engageablewith the locking device and the trigger to release the latter and permitit to gravitate out of the path of movement of the bolt, and a latchoperable for engagement with the bolt to fasten the latter againstmovement.

In testimony whereof I have atfixed my signature in presence of twowitnesses.

JOHN B. CALVERT.

Witnesses:

R. P. CARSON, N. J. MEYER.

Copies of. this patent may he obtained for five cents each, byaddressing the Commissioner of IPatents, Washington, D. C.

